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Regulators, mount up!
The all-mountain steed is here to deliver fun on every trail.
The Regulator SX is our all-mountain eMTB designed to provide a nimble and responsive ride. No trail is too tame or too gnarly for the dedicated mixed-wheel platform with 150mm rear and 160mm front travel and geometry that promotes agility and playfulness. The Regulator SX will be the choice for riders looking for a chassis that excels in a variety of terrain with the added assistance of a Bosch SX drive unit delivering 55nm of torque from a 400wh battery. Coupled with our SBG geometry, you have an eMTB experience close to that of non-assisted bikes. This combination provides the best range-to-weight ratio for those who value lighter ride characteristics, giving you the best of both worlds with one of the most reliable and intuitive motor systems available on the market. For those looking for extra range, the Bosch range extender will take you up to 650wh for all day adventures.
AVAILABLE COLORS:
 Madrone Gold (Satin)    Stormshadow (Gloss)
SELECT BUILD
  $6,999 USD
  $8,999 USD

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$499 USD
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$6,999 USD
FREE SHIPPING: We offer free shipping on all bikes and frames, see checkout for additional details.
IN STOCK: Ships within 2 business days
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PRICE $6,999 USD $8,999 USD
FRAME Regulator SX Carbon 150mm Regulator SX Carbon 150mm
WHEEL SIZE Mixed Mixed
DRIVE UNIT Bosch Performance Line SX (BDU31) Bosch Performance Line SX (BDU31)
BATTERY Bosch CompactTube (400wh) Bosch CompactTube (400wh)
DISPLAY Bosch System Controller Bosch System Controller
ASSIST SWITCH Bosch Wireless Mini Remote Bosch Wireless Mini Remote
REAR SHOCK RockShox SuperDeluxe Select
(205x60mm)
RockShox SuperDeluxe Ultimate
(205x60mm)
FORK RockShox Lyrik Base
(160mm)
RockShox Lyrik Ultimate
(160mm)
HEADSET FSA No.57E FSA No.57E
STEM RaceFace Aefect R (40mm) ANVL Swage (40mm)
HANDLEBAR RaceFace Chester 35
SM (780x20)
MD/LG/XL (780x35)
OneUp Carbon
SM (800x20)
MD/LG/XL (800x35)
GRIPS ODI Elite Flow Lock-On ODI Elite Flow Lock-On
SADDLE SDG Bel Air 3 SDG Bel Air 3 LUX
SEATPOST SDG Tellis
SM (150mm)
MD (170mm)
LG (200mm)
XL (230mm)
OneUp Dropper Post
SM (150mm)
MD (180mm)
LG (210mm)
XL (240mm)
BRAKES Shimano Deore M6120 4 Piston TRP EVO PRO
ROTORS Shimano RT66 (203mm) TRP R1 2.3 (203mm)
SHIFTER Shimano Deore M6100 iSpec EV Shimano XT M8100
DERAILLEUR Shimano Deore M6100 SGS 12sp Shimano XT M8100 SGS 12sp
CASSETTE Shimano Deore M6100 (10-51t) Shimano XT M8100 (10-51t)
CHAIN Shimano Deore M6100 Shimano XT M8100
CRANK RaceFace Aeffect R E-MTB (160mm) RaceFace ERA Carbon E-MTB (160mm)
CHAINRING E*Thirteen Helix Race Direct Mount (32t) E*Thirteen Helix Race Direct Mount (32t)
CHAINGUIDE Transition Integrated Top Guide Transition Integrated Top Guide
RIMS WTB ST i30 DT Swiss XM 481
SPOKES Pillar Double Butted DT Swiss Competition
HUBS Novatech D791SB/D902SB DT Swiss 350 Classic DEG
TIRE/FRONT Maxxis Assegai 3C EXO/TR (2.5) Maxxis Assegai 3C EXO+ (2.5)
TIRE/REAR Maxxis Minion DHRII 3C EXO/TR (2.4) Maxxis Minion DHRII 3C EXO+ (2.4)
INCLUDED Bosch Charger
Tubeless Valves & Sealant
Bosch Charger
Tubeless Valves & Sealant
COLOR OPTIONS
Stormshadow Grey
Madrone Gold
Stormshadow Grey
Madrone Gold
WEIGHT TBD 41.16 lbs / 18.67 kg (Size MD)
Specs are subject to change at any time. All complete bikes are 95% assembled and packaged for quick and easy final assembly, and as such, Transition Bikes is not able to make special request build spec changes or modifications to packaging.
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RIDE FEEL FOCUS

150/160mm Mixed Wheels

The dedicated mixed-wheel platform with 150mm rear and 160mm front travel make the Regulator SX nimble and responsive, blurring the lines between our powered and non-powered bikes with complete builds starting at just over 41lbs. With a 64.5 degree headtube angle and short, 27.5" wheel specific chainstays, we were able to make the Regulator one of the most maneuverable eMTBs we've ever ridden. This keeps the ride fun and engaging on everything from smooth flow trails to steep tech.

High Power to Weight

The Bosch SX system delivers the highest power-to-weight ratio possible. Perfect for riders who want the lightest ride characteristic from their eMTB and have it excel in a wide variety of terrain, from smooth singletrack to rocks and roots. The Bosch SX system is one of the lightest on the market, while still providing a high peak power of 600 watts. Complete builds come in at just over 41lbs, giving you a ride feel nearly matched to that of our non-powered bikes.

DIG INTO THE DETAILS

INTEGRATED CHAIN GUIDE

Designed in-house, our pre-installed chainguide ensures you never miss a pedal stroke.






Speed Balanced Geometry
SBG ensures the bike maintains low speed agility, front wheel traction, and proper rider weight balance while actually increasing confidence in steep terrain and at high speeds. With SBG, a slacker head tube angle is combined with a reduced offset fork standard, preventing the front wheel from being too far in front of the rider. This improves front to rear weight distribution on the bike, which is often out of balance on long and slack bikes. One of SBG's greatest benefits is that it creates a confident steering feel that adapts to wheel speed. More stability when going fast, more agility on technical slow speed maneuvering as well as improved traction, control and confidence for any skill level of rider.

SM
MD
LG
XL
A.REACH 425 455 480 510
B.STACK 623 632 641 651
C.EFFECTIVE TOPTUBE LENGTH 551 583 610 643
D.SEATTUBE LENGTH 375 400 440 470
E.EFFECTIVE SEATTUBE ANGLE 78.8 78.5 78.2 77.9
SADDLE HEIGHT FOR EFFECTIVE SEATTUBE ANGLE 600 660 720 780
ACTUAL SEATTUBE ANGLE 75 75 75 75
SEATTUBE OFFSET AT BOTTOM BRACKET 41 41 41 41
F.HEADTUBE LENGTH 105 115 125 135
G.HEADTUBE ANGLE 64.5 64.5 64.5 64.5
H.CHAINSTAY LENGTH 442 442 448 448
I.WHEELBASE 1201 1235 1271 1305
J.BOTTOM BRACKET DROP 25 25 25 25
K.ESTIMATED BOTTOM BRACKET HEIGHT 350 350 350 350
   


GIDDYUP
SUSPENSION
DESIGN


We want to make it as easy as possible to experience great rear suspension performance. The GiddyUp suspension system is designed to behave intuitively across a broad range of setup. Because, we get it, sometimes you just want to grab your bike and GiddyUp, without checking your setup.

We did this by balancing a 27% progressive leverage curve with a consistent rate of change. Anti-squat is tuned to enhance pedaling performance and acceleration. Overall chain growth is moderate and reduces after sag so the chain tension doesn't get in the way of the suspension working.

This translates to supple small bump compliance and great mid-stroke support that gradually transitions into a subtle, yet supportive end-of-stroke ramp. The amount of consistent progression is carefully optimized for both air and coil shocks. Riders are able to add or remove volume spacers in air shocks to suit their individual riding style. The Regulator has 150mm of rear wheel travel when used with the supplied 205mm x 60mm stroke shock. It is also possible to install a longer stroke shock of 205mm x 65mm to increase the rear wheel travel to 160mm.

A wide usable sag range of 27-33% allows the rider to tune the feel of the bike; from poppy and playful, to planted for plowing. Wherever you end up, you can focus on the trail without remotes, levers or knobs. Just grab your bike and GiddyUp.


LEVERAGE CURVES

"After a month of living with and riding the Regulator SX, I can proudly say that my opinion of electric mountain bikes has changed for the better. With the smaller 400-watt-hour battery and compact, lightweight SX motor, it barely looks or feels like an eMTB. This disguise even encouraged me to pedal it without assistance for a few 20+ mile rides, and I won't hesitate to do it again." - Deven McCoy
  Click here for the full review


"The Regulator, in SX or CX trim, is an exceptionally fun and versatile ripper that rides less like an e-bike and more like a traditional mountain bike." - Shawn Spomer
  Click here for the full review


"Both versions prioritize handling and playful, natural ride quality over pure plow-and-smash capability. That said, these bikes are still very capable—you could take them just about anywhere and have a good time." - Conor Barry
  Click here for the full review


Frame Specifications

REAR TRAVEL: 150mm (Compatible with 160mm)
FRONT TRAVEL: 160mm
WHEEL SIZE: 29" Front / 27.5" Rear
SIZES: SM, MD, LG, XL
FRAME BEARINGS: 2x 6903, 2x 6902, 6x 6802, 2x 6900
FORK AXLE TO CROWN: 579mm
FORK OFFSET: 44mm
REAR SHOCK SIZE: 205mm x 60mm (compatible with 205 x 65mm)
SHOCK HARDWARE: Trunnion Mount Top / 30mm x 8mm Bottom
HEADSET (TOP): 44mm Zero Stack
HEADSET (BOTTOM): 56mm Zero Stack
BB SHELL: 73mm BSA Threaded
CHAINLINE: 55mm
REAR BRAKE MOUNT: 180mm Post Mount, Max Rotor Size 223mm
REAR AXLE: Transition Axle For UDH, 12mm x 148mm Spacing
ISCG TABS: ISCG05
SEATPOST
DIAMETER:
31.6mm
SEAT CLAMP: Carbon: 37.0mm
MAX SEATPOST INSERTION: Small 235mm | Medium 260mm | Large 300mm | X-Large 330mm
MAX CHAINRING SIZE:   34T Standard Single Ring
MAX TIRE SIZE: 27.5” x 2.6" (*see FAQ)
REAR SHOCK SAG: 150mm/60mm: 16-20mm (26-32%)




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